Parallel valve-spring lifter



Sept. 15. 1925. 1,553,623

J. H. M LEOD.

/ rARALLEL VALVE'SPRING LIFTER Filed Aug. 20, 1924- INVENTOR PatentedSept. 15, 1925.

UNITED Joint :n. Manson, :o r 's rocn'ron, can-mennm, AssIGNon orONE-HALF TO Fain) cmmx, or s rocxroN, oanrronnm.

EPARALLEL meme-me mam.

Application fiiQa-lm' u t 20,1324. seams. 7333390.

To all whom it mag ;c0n0ern:

'Be it known that I, JOHN H. MCLEQD,'.a

citizen ,of the United States, residing' at ,Stockton, ;c oiinty of SanJoaquin, State or" California, have invented .certainnew and useful,Improvements inv @Paralflel =Valve- Sprii' gLitters and ,I. do declarethe followingztoibea full, clear, and exactdescr ption otsame, referencebeing hadto the accompanying drawings, .and to (the characters ofreference marked thereon, which fforni a ,pm

of .this application.

, This invent on relates (to. improvements ,in

devices. :for compressing the springs of the valves. of gas engines,while said springs, are grill :in" place, (in order to {enable thespringcupho ding means to .be;removed from the valve stem, and the valvethen \WlthdITHIWII from'the engine. I

The (principal objectofmy invention is to ,provide a device for the.purpose so constructed that the cup ,in which one end of the springseats, will be moved along the stem parallel toitsinormalpositionregard- .lBSS-idf the distance which sai d cup ismoved and the spring compressed.

The spring will also ofcorifsefbe (compressed without lateraldeflection, andthe valve stem can thereforebe easilyturned 11 1 orwithdrawn gfrom the cup and sprmgwvrthout any binding between the stemand .the

otherfparts beinghad.

Another objectds to provide a safety lock or catch means .onthedevice-zso arranged that .whenonce compressed, a spri ngiwillbemaintained .in ,that positionwlt'hout danger I physical effort on thepart of the operator being necessary.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly efitective for the purposefor which it is designed.

These objects I accomplish by means of such structure and relativearrangement of ,erence indicate l'correspondilig ,parts willfjfully:appearby va' perusal of [the {following specification and claims.

In the drawings similar characters of ref parts ind'the severailviews; la

iFig. 1is aside viewofthe tool, showing the actual springcompressing'members in their closed .or. adjacent positions, and aslinitially ,placedlinlconnection with a valve Sp s I Fig. 2,1sfa s milarview, y-showm-g said members separated and the spring .com-

gpressed' to expose the, spring-cup lock.

3 is top .pan view or ,the spring- :cup engaging member ofthe tool.

. Referring ,now -:n1or 'e particularly to .the characters of reference.on the;v drawings, the jinnneralsil and 2 .denote a -pair or,symmetricaland rigid bars, having atone end .rork d orslotted heads 3and .4,:.forming I jaws which are (disposed at an angle :to {the m jor.portions lofithehars so .thatwhen the heads, are abutted, the bars willdiverge from eachother.

The head 3 is recessed @around its opening as at5, the bottoin of thisrecesslbeingisubjstan ially parallel to" the outer face". of the head.4. v L Y s 'Proj ecting"v betweenlthe bars [from the ends .f thereofopposite'the heads are; cooperating ,and.:symin-etrical handle members 6and "7 said Ilianfdle ,membersbeing pivoted to each other intermediatetheir ends, abut .not crossed, as indicated at f 8, .lVhenthe heads areabutted," the innerfends .of the handle inen ibfer's are likewise.abvutted against each other. The handlebar Gthen rests against V theinner ffacQQfithe bar 1, while the handle bar? ,res'ts against the innerface of the handle barsfthereffore fjdiverge from each other,outwa'rdlyofthe pivot 8, as do the bars 1 and 2. The actual hand gripportions 9 ofthe handle members of course extend beyond the ends of thebars 1 and 2.

The inner ends of the handle members 6 and 7 are pivoted onto the bars 1and 2 respectively, as shown at 10. Between the handle 7, outwardly ofthe pivot 8, and the outer end of the bar 1, link means 11 extend,pivoted at both ends, while similar link means 12 similarl dis osedextend between i a y a I the bar 6 and bar 2.

The distance from the pivots 10 to the pivot 8 is the same as from saidpivot 8 to the pivots of the links 11 and 12 with the members 6 and 7while the pivots of said links with the bars 1 and 2 lie in a lineprojected through the first named link pivots.

This arrangement of connection between the handles and bars 1 and 2causes the latter, when the handles are moved about their main pivot 8,to always move parallel to each other, the heads 3 and 4 of coursemaintaining their parallel relationship.

To hold the heads at different distances apart against a pressuretending to force them together, I pivot on the handle memher 6, justbeyond the outer end of the bar 1, a short bar 13 projecting outwardlyof and substantially at right angles to the member 6. This bar, on itsface nearest the bar 1, has a plurality of transverse pawlteeth 14adapted to engage a notch15 cutin the end of the bar 1. A finger pad 16is provided with the member 13, to enable it to be swung clear of thebar 1, and a spring 17 is disposed between said pad and bar 6.

to force the member 13 toward the end of the bar 1. This locking deviceis so arranged that the outer ends of the handles may be broughttogether without interference, but the bar 6 cannot approach the bar 1unless the pawl member is released from engagement with the bar 1. Sincesaid bars 6 and 1 must move toward each other to bring the heads 3 and 4together, it will be evident that by thus preventing movement of thebars 6 and 1 in this direction, the heads cannot approach each other.

In operation, the heads are allowed to come together, and the operator,grasping the tool by the handles, slides the heads over the valve stem18 between the spring seating cup 19 on the stem and the push rod 20, asshown in Fig. 1. Upon the'handles being brought together, the head twill bear on top of the push rod, while the cup 19 will seat in therecess 5 of the head 3, and a sufficient contraction of the handles willcause the cup to be lifted clear of the look ing member 21 on the valvestem, exposing the latter between the heads and permitting of its readyremoval. The heads moving parallel to each other, the cup will be raisedwithout deflection from its normal setting,

and hence no binding of the same against the stem will be had.

- From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfills the objects ,ed to eachother intermediate their ends,

said handle members partially projecting b tween the members and fromthe ends thereof opposite to the jaws, the handles at their inner endsbeing pivoted on the members intermediate their ends, and link meanspivoted to the handles intermediate the outer ends and the pivotalconnection thereof, and to the members, in a manner to cause the membersto move in parallel relation to each other with any movement of thehandles.

2. A valve-spring lifter comprising a pair of rigid members having jawsat their corresponding ends, cooperating handles pivoted to each otherintermediate their ends, said handle members partially projecting between the members and from the ends thereof opposite to the jaws, thehandles at their inner ends being pivoted on the members intermediatetheir ends, link means pivoted to the handles intermediate the outerends and the pivotal connection thereof, and to the members, inrelatively opposed relation; the distance from the pivots of the handleswith the members to the pivotal connection of the handles themselvesbeing equal to the distance from said pivotal connection to the pivotsof the links with the handles, and the pivotal connection of the linkswith the members being on a line projected through said handle and linkpivots.

In testimony whereof I aflix my signature.

JOHN H. MoLEOD.

